java -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/bubblesort.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 12:44:31,115 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 12:44:31,117 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 12:44:31,129 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 12:44:31,129 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 12:44:31,130 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 12:44:31,132 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 12:44:31,138 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 12:44:31,140 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 12:44:31,141 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 12:44:31,141 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 12:44:31,143 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 12:44:31,144 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 12:44:31,145 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 12:44:31,145 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 12:44:31,146 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 12:44:31,148 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 12:44:31,150 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 12:44:31,151 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 12:44:31,152 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 12:44:31,154 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 12:44:31,156 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 12:44:31,156 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 12:44:31,157 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 12:44:31,158 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 12:44:31,159 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 12:44:31,159 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 12:44:31,160 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 12:44:31,161 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 12:44:31,162 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 12:44:31,162 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 12:44:31,163 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 12:44:31,163 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 12:44:31,164 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 12:44:31,165 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 12:44:31,165 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 12:44:31,183 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 12:44:31,183 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 12:44:31,183 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 12:44:31,184 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 12:44:31,185 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 12:44:31,185 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 12:44:31,186 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 12:44:31,186 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 12:44:31,186 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 12:44:31,186 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 12:44:31,186 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 12:44:31,187 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 12:44:31,187 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 12:44:31,187 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 12:44:31,187 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 12:44:31,187 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 12:44:31,188 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 12:44:31,189 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 12:44:31,189 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 12:44:31,249 INFO ]: Repository-Root is: /tmp [2018-06-18 12:44:31,265 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 12:44:31,271 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 12:44:31,272 INFO ]: Initializing SmtParser... [2018-06-18 12:44:31,273 INFO ]: SmtParser initialized [2018-06-18 12:44:31,273 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/bubblesort.smt2 [2018-06-18 12:44:31,274 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-18 12:44:31,359 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/bubblesort.smt2 unknown [2018-06-18 12:44:31,890 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/bubblesort.smt2 [2018-06-18 12:44:31,895 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 12:44:31,908 INFO ]: Walking toolchain with 4 elements. [2018-06-18 12:44:31,909 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 12:44:31,909 INFO ]: Initializing ChcToBoogie... [2018-06-18 12:44:31,909 INFO ]: ChcToBoogie initialized [2018-06-18 12:44:31,916 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:44:31" (1/1) ... [2018-06-18 12:44:37,486 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:44:37 Unit [2018-06-18 12:44:37,486 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 12:44:37,486 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 12:44:37,487 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 12:44:37,487 INFO ]: Boogie Preprocessor initialized [2018-06-18 12:44:37,509 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:44:37" (1/1) ... [2018-06-18 12:44:37,509 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:44:37" (1/1) ... [2018-06-18 12:44:37,644 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:44:37" (1/1) ... [2018-06-18 12:44:37,644 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:44:37" (1/1) ... [2018-06-18 12:44:37,789 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:44:37" (1/1) ... [2018-06-18 12:44:37,790 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:44:37" (1/1) ... [2018-06-18 12:44:37,961 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:44:37" (1/1) ... [2018-06-18 12:44:38,166 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 12:44:38,167 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 12:44:38,167 INFO ]: Initializing RCFGBuilder... [2018-06-18 12:44:38,167 INFO ]: RCFGBuilder initialized [2018-06-18 12:44:38,168 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:44:37" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 12:44:38,179 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 12:44:38,179 INFO ]: Found specification of procedure False [2018-06-18 12:44:38,179 INFO ]: Found implementation of procedure False [2018-06-18 12:44:38,179 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 12:44:38,179 INFO ]: Found specification of procedure state [2018-06-18 12:44:38,179 INFO ]: Found implementation of procedure state [2018-06-18 12:44:38,179 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 12:44:38,180 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 12:44:38,180 INFO ]: Found implementation of procedure Ultimate.START [2018-06-18 12:44:43,952 INFO ]: Using library mode [2018-06-18 12:44:43,953 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:44:43 BoogieIcfgContainer [2018-06-18 12:44:43,953 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 12:44:43,954 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 12:44:43,954 INFO ]: Initializing TraceAbstraction... [2018-06-18 12:44:43,957 INFO ]: TraceAbstraction initialized [2018-06-18 12:44:43,958 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 12:44:31" (1/3) ... [2018-06-18 12:44:43,959 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d806afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 12:44:43, skipping insertion in model container [2018-06-18 12:44:43,959 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 12:44:37" (2/3) ... [2018-06-18 12:44:43,959 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d806afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 12:44:43, skipping insertion in model container [2018-06-18 12:44:43,959 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 12:44:43" (3/3) ... [2018-06-18 12:44:43,961 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 12:44:43,970 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 12:44:43,979 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 12:44:44,026 INFO ]: Using default assertion order modulation [2018-06-18 12:44:44,026 INFO ]: Interprodecural is true [2018-06-18 12:44:44,026 INFO ]: Hoare is false [2018-06-18 12:44:44,026 INFO ]: Compute interpolants for FPandBP [2018-06-18 12:44:44,026 INFO ]: Backedges is TWOTRACK [2018-06-18 12:44:44,026 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 12:44:44,026 INFO ]: Difference is false [2018-06-18 12:44:44,026 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 12:44:44,026 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 12:44:44,040 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 12:44:44,060 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 12:44:44,060 INFO ]: Found error trace [2018-06-18 12:44:44,062 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:44:44,062 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:44:44,067 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 12:44:44,068 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:44:44,069 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:44:44,104 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:44:44,104 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:44:44,104 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:44:44,149 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:44:44,160 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:44:44,298 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 12:44:44,306 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 12:44:44,306 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 12:44:44,308 INFO ]: Interpolant automaton has 4 states [2018-06-18 12:44:44,319 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 12:44:44,320 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 12:44:44,322 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 12:44:44,489 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:44:44,489 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 12:44:44,490 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 12:44:44,491 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 12:44:44,492 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:44:44,507 INFO ]: With dead ends: 13 [2018-06-18 12:44:44,507 INFO ]: Without dead ends: 13 [2018-06-18 12:44:44,511 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 12:44:44,530 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 12:44:44,564 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 12:44:44,566 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 12:44:44,566 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 12:44:44,568 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 12:44:44,568 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:44:44,568 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 12:44:44,568 INFO ]: Interpolant automaton has 4 states. [2018-06-18 12:44:44,568 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 12:44:44,569 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 12:44:44,569 INFO ]: Found error trace [2018-06-18 12:44:44,569 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:44:44,570 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:44:44,570 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 12:44:44,570 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:44:44,570 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:44:44,571 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:44:44,571 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:44:44,571 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:44:44,715 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:44:44,716 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:44:45,156 WARN ]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-18 12:44:45,330 WARN ]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-18 12:44:45,417 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:44:45,417 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:44:45,417 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 12:44:45,438 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:44:45,538 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:44:45,551 INFO ]: Computing forward predicates... [2018-06-18 12:44:49,552 WARN ]: Spent 2.39 s on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2018-06-18 12:44:49,882 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 12:44:49,951 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:44:49,951 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-18 12:44:49,952 INFO ]: Interpolant automaton has 9 states [2018-06-18 12:44:49,952 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-18 12:44:49,952 INFO ]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-18 12:44:49,952 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-18 12:44:50,419 WARN ]: Spent 356.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2018-06-18 12:44:50,586 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2018-06-18 12:44:50,613 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:44:50,613 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 12:44:50,614 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 12:44:50,614 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-18 12:44:50,614 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:44:50,615 INFO ]: With dead ends: 15 [2018-06-18 12:44:50,615 INFO ]: Without dead ends: 15 [2018-06-18 12:44:50,615 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-06-18 12:44:50,615 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 12:44:50,618 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 12:44:50,618 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 12:44:50,618 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 12:44:50,618 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 12:44:50,618 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:44:50,618 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 12:44:50,618 INFO ]: Interpolant automaton has 9 states. [2018-06-18 12:44:50,618 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 12:44:50,619 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 12:44:50,619 INFO ]: Found error trace [2018-06-18 12:44:50,619 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:44:50,619 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:44:50,619 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 12:44:50,619 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:44:50,619 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:44:50,620 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:44:50,620 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 12:44:50,620 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:44:50,717 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:44:50,718 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:44:51,034 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 12:44:51,034 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:44:51,034 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 12:44:51,042 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 12:44:51,131 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 12:44:51,131 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:44:51,139 INFO ]: Computing forward predicates... [2018-06-18 12:44:54,967 WARN ]: Spent 2.64 s on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2018-06-18 12:44:56,742 WARN ]: Spent 580.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-06-18 12:44:58,215 WARN ]: Spent 530.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-06-18 12:44:58,243 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 12:44:58,275 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 12:44:58,275 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-18 12:44:58,275 INFO ]: Interpolant automaton has 12 states [2018-06-18 12:44:58,276 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-18 12:44:58,276 INFO ]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-06-18 12:44:58,276 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-18 12:44:58,452 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2018-06-18 12:44:58,783 WARN ]: Spent 129.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2018-06-18 12:44:58,946 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2018-06-18 12:44:58,974 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 12:44:58,974 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 12:44:58,975 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 12:44:58,975 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-18 12:44:58,975 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 12:44:58,975 INFO ]: With dead ends: 19 [2018-06-18 12:44:58,975 INFO ]: Without dead ends: 19 [2018-06-18 12:44:58,976 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-06-18 12:44:58,976 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 12:44:58,979 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 12:44:58,979 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 12:44:58,980 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 12:44:58,980 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2018-06-18 12:44:58,980 INFO ]: Finished accepts. word is rejected. [2018-06-18 12:44:58,980 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 12:44:58,980 INFO ]: Interpolant automaton has 12 states. [2018-06-18 12:44:58,980 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 12:44:58,981 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 12:44:58,981 INFO ]: Found error trace [2018-06-18 12:44:58,981 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 12:44:58,981 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 12:44:58,981 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 3 times [2018-06-18 12:44:58,982 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 12:44:58,982 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 12:44:58,984 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:44:58,984 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 12:44:58,984 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 12:44:59,290 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:44:59,291 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 12:44:59,786 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-18 12:45:00,166 WARN ]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-06-18 12:45:00,826 WARN ]: Spent 567.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 69 [2018-06-18 12:45:01,054 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 12:45:01,055 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 12:45:01,055 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 12:45:01,062 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 12:45:01,219 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-06-18 12:45:01,219 INFO ]: Conjunction of SSA is unsat [2018-06-18 12:45:01,238 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-18 12:45:24,954 WARN ]: Removed 939 from assertion stack [2018-06-18 12:45:24,955 INFO ]: Timeout while computing interpolants [2018-06-18 12:45:25,155 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 12:45:25,155 WARN ]: Verification canceled [2018-06-18 12:45:25,159 WARN ]: Timeout [2018-06-18 12:45:25,159 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 12:45:25 BoogieIcfgContainer [2018-06-18 12:45:25,159 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 12:45:25,160 INFO ]: Toolchain (without parser) took 53265.02 ms. Allocated memory was 308.8 MB in the beginning and 2.0 GB in the end (delta: 1.7 GB). Free memory was 242.3 MB in the beginning and 929.9 MB in the end (delta: -687.6 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-18 12:45:25,161 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 12:45:25,161 INFO ]: ChcToBoogie took 5577.14 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 242.3 MB in the beginning and 874.6 MB in the end (delta: -632.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-18 12:45:25,162 INFO ]: Boogie Preprocessor took 680.06 ms. Allocated memory is still 1.5 GB. Free memory was 874.6 MB in the beginning and 778.7 MB in the end (delta: 95.9 MB). Peak memory consumption was 95.9 MB. Max. memory is 3.6 GB. [2018-06-18 12:45:25,162 INFO ]: RCFGBuilder took 5786.11 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 309.3 MB). Free memory was 778.7 MB in the beginning and 898.8 MB in the end (delta: -120.1 MB). Peak memory consumption was 758.8 MB. Max. memory is 3.6 GB. [2018-06-18 12:45:25,163 INFO ]: TraceAbstraction took 41204.93 ms. Allocated memory was 1.9 GB in the beginning and 2.0 GB in the end (delta: 110.6 MB). Free memory was 898.8 MB in the beginning and 929.9 MB in the end (delta: -31.1 MB). Peak memory consumption was 557.1 MB. Max. memory is 3.6 GB. [2018-06-18 12:45:25,166 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 5577.14 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 242.3 MB in the beginning and 874.6 MB in the end (delta: -632.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. * Boogie Preprocessor took 680.06 ms. Allocated memory is still 1.5 GB. Free memory was 874.6 MB in the beginning and 778.7 MB in the end (delta: 95.9 MB). Peak memory consumption was 95.9 MB. Max. memory is 3.6 GB. * RCFGBuilder took 5786.11 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 309.3 MB). Free memory was 778.7 MB in the beginning and 898.8 MB in the end (delta: -120.1 MB). Peak memory consumption was 758.8 MB. Max. memory is 3.6 GB. * TraceAbstraction took 41204.93 ms. Allocated memory was 1.9 GB in the beginning and 2.0 GB in the end (delta: 110.6 MB). Free memory was 898.8 MB in the beginning and 929.9 MB in the end (delta: -31.1 MB). Peak memory consumption was 557.1 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 1547. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 41.1s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 33 SDtfs, 25 SDslu, 66 SDs, 0 SdLazy, 52 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 12.6s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 8112 SizeOfPredicates, 270 NumberOfNonLiveVariables, 434 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 8/26 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bubblesort.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_12-45-25-177.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bubblesort.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_12-45-25-177.csv Completed graceful shutdown